Is CVE-2025-58143 actively exploited?

No active exploitation of CVE-2025-58143 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-58143 be exploited remotely?

Yes. CVE-2025-58143 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-58143?

CVE-2025-58143 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2025-58143

CRITICAL

CVE-2025-58143

CWE-366Published: September 11, 2025· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

[This CNA information record relates to multiple CVEs; the

text explains which aspects/vulnerabilities correspond to which CVE.]

There are multiple issues related to the handling and accessing of guest

memory pages in the viridian code:

1. A NULL pointer dereference in the updating of the reference TSC area.

This is CVE-2025-27466.

2. A NULL pointer dereference by assuming the SIM page is mapped when

a synthetic timer message has to be delivered. This is

CVE-2025-58142.

3. A race in the mapping of the reference TSC page, where a guest can

get Xen to free a page while still present in the guest physical to

machine (p2m) page tables. This is CVE-2025-58143.

NVD Source

Technical Analysis

CVE-2025-58143 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.